Linux Health Check

Generate a system health check report (CPU, Memory, Disk, and top processes) and optionally send it via Discord.

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Features

• Host information: hostname, kernel version, uptime, CPU model
• Top memory-consuming processes
• Disk usage with thresholds:
• <90% → Normal
• 90–95% → Caution
• > 95% → Unhealthy
• Memory usage report (Physical and Swap, in GB)
• Generates a timestamped report file automatically
• Optional integration with Discord to send the report

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Script Overview

#!/bin/bash

function sysstat {
echo -e "
#####################################################################
    Health Check Report (CPU,Process,Disk Usage, Memory)
#####################################################################

Hostname         : `hostname`
Kernel Version   : `uname -r`
CPU              : `grep "model name" /proc/cpuinfo | cut -d ' ' -f3- | awk {'print $0'} | head -1`
Uptime           : `uptime -p`

*********************************************************************
                             Process
*********************************************************************

=> Top memory using processs/application

PID %MEM RSS COMMAND
`ps aux | awk '{print $2, $4, $6, $11}' | sort -k3rn | head -n 10`

*********************************************************************
Disk Usage - > Threshold
< 90 Normal
> 90% Caution
> 95 Unhealthy
*********************************************************************
"
df -Pkh | grep -v 'Filesystem' > /tmp/df.status
while read DISK
do
    LINE=`echo $DISK | awk '{print $1,"\t",$6,"\t",$5," used","\t",$4," free space"}'`
done < /tmp/df.status
while read DISK
do
    USAGE=`echo $DISK | awk '{print $5}' | cut -f1 -d%`
    if [ $USAGE -ge 95 ]
    then
        STATUS='Unhealty'
    elif [ $USAGE -ge 90 ]
    then
        STATUS='Caution'
    else
        STATUS='Normal'
    fi

    LINE=`echo $DISK | awk '{print $1,"\t",$6}'`
    echo -ne $STATUS "\t\t" $LINE
    echo
done < /tmp/df.status
rm /tmp/df.status

TOTALMEM=`free -m | head -2 | tail -1| awk '{print $2}'`
TOTALBC=`echo "scale=2;if($TOTALMEM<1024 && $TOTALMEM > 0) print 0;$TOTALMEM/1024"| bc -l`
USEDMEM=`free -m | head -2 | tail -1| awk '{print $3}'`
USEDBC=`echo "scale=2;if($USEDMEM<1024 && $USEDMEM > 0) print 0;$USEDMEM/1024"|bc -l`
FREEMEM=`free -m | head -2 | tail -1| awk '{print $4}'`
FREEBC=`echo "scale=2;if($FREEMEM<1024 && $FREEMEM > 0) print 0;$FREEMEM/1024"|bc -l`
TOTALSWAP=`free -m | tail -1| awk '{print $2}'`
TOTALSBC=`echo "scale=2;if($TOTALSWAP<1024 && $TOTALSWAP > 0) print 0;$TOTALSWAP/1024"| bc -l`
USEDSWAP=`free -m | tail -1| awk '{print $3}'`
USEDSBC=`echo "scale=2;if($USEDSWAP<1024 && $USEDSWAP > 0) print 0;$USEDSWAP/1024"|bc -l`
FREESWAP=`free -m |  tail -1| awk '{print $4}'`
FREESBC=`echo "scale=2;if($FREESWAP<1024 && $FREESWAP > 0) print 0;$FREESWAP/1024"|bc -l`

echo -e "
*********************************************************************
             Memory
*********************************************************************

=> Physical Memory

Total\tUsed\tFree\t%Free

${TOTALBC}GB\t${USEDBC}GB \t${FREEBC}GB\t$(($FREEMEM * 100 / $TOTALMEM  ))%

=> Swap Memory

Total\tUsed\tFree\t%Free

${TOTALSBC}GB\t${USEDSBC}GB\t\t${FREESBC}GB\t$(($FREESWAP * 100 / $TOTALSWAP  ))%
}
FILENAME="health-`hostname`-`date +%y%m%d`.txt"
sysstat > $FILENAME
/usr/local/cust/discord.sh --text "Report file $FILENAME." --file "$FILENAME"

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Usage

1. Save the script as sys_health.sh.
2. Make it executable:

chmod +x sys_health.sh

1. Run it:

./sys_health.sh

• Generates a file like health-<hostname>-<date>.txt.
• Optionally sends the report via Discord if discord.sh is configured.

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Notes

• Thresholds can be adjusted in the script.
• Requires bash, awk, sort, ps, df, free commands available on the system.
• Compatible with most Linux distributions.